If the Light + Building trade fair in Frankfurt is home to exhibitors the majority of us have never heard of, Passenger Terminal Expo as Europe's leading trade fair for airport infrastructure is home to exhibitors you never knew you were aware of: the developers of airport signage systems, for example, or manufacturers of airport security gates, baggage carousels, airline ticketing systems or self-check in terminals, and of course that sweet female voice who informs you that your gate has
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